Horsetail is a nonflowering weed that has been used for health purposes since Roman and Greek times. It grows in parts of Asia as well as in Europe, the Middle East and North America. The parts of the plant that grow above ground are used to create natural medicine.
Horsetail is a natural remedy for fluid retention and is used to treat bladder and kidney stones, according to Web MD. Horsetail also reportedly helps with incontinence and is a natural treatment for urinary tract infections. The herb is applied topically to speed up wound healing and sooth burns. Silicone is present in horsetail, which helps to strengthen bones, making horsetail a natural treatment for osteoporosis. Although some studies suggest horsetail can treat ailments, not enough studies have been conducted to validate these effects in humans, according to the University of Maryland Medical Center.